SpongeBob and Patrick make their "surprised" faces when they first see the Badlands.

The trench is very similar to the trench from the movie.

SpongeBob's voice when he's dried out is just like it is when the Cyclops dries him out with a lamp. This was also referenced in some of other episodes which had SpongeBob inside Sandy's treedome without a water helmet.

It is revealed that the reason Squidward doesn't have a brother or sister is that his mother thought Squidward was enough.

It would be impossible for Mrs. Tentacles to legally adopt SpongeBob and Patrick because they are legal adults.

This episode may take place before "Help Wanted" because Squidward says he has not heard from SpongeBob or Patrick during the six months they spend searching for Squidward’s brother, meaning SpongeBob does not go to work for all that time. This is unlike SpongeBob, meaning he probably is not employed yet.

The real Mariana Trench is the deepest part of the world's oceans, with a maximum depth of 36,070 ft (10,994 meters) below sea level. In this episode, the Mariana Trench is treated more as an extremely deep canyon.